powershell

Invoke webrequest example

Jonas Dahlgren powershell

This example uses invoke-webrequest to retrieve computer information from a company reporting webpage. Only text inside TD elements are stored in a array for future use and added to a PSObject.

function Get-ComputerInfo
{
	[CmdletBinding()]
	param
(
		[parameter(
			 ValueFromPipeline = $true,
			 position = 0,
			 Mandatory = $true)]
	[string]$computername
)

	process
	{
		$Request = @{
			'domain'	  = 'domain1.company.net'
			'name'    = $computername
		}
		$lab = Invoke-WebRequest -Uri https://reporting.company.net/searchcomputer.php -Body $Request -Method Post

		$output = $lab.ParsedHtml.body.getElementsBytagname('TD') | select -expand innerhtml

		if ($output[7] -match '\D\d\d\d\d\d\d\d')
		{
			$user = Get-ADUser -Identity $output[7] | select -ExpandProperty name
		}
		else
		{
			$user = "Unknown"
			$output[7]= "Unknown"
		}

		$result = New-Object PSObject -Property @{
			Computername	    = $output[0];
			OU				    = $output[2];
			IP				    = $output[6];
			OS				    = $output[3];
			LastUser		    = $output[7];
			LastUSerFullName    = $user;
			LastSeen		    = $output[5];
			Master			    = $output[4];
		}
		Write-Output $result | select computername, ou, ip, os, master, lastuser, lastuserfullname, lastseen
	}#End Process
}

Migrate VMs between clusters with powecli

Jonas Dahlgren powercli, powershell

A short script to migrate VMs to a new cluster or host. Migrates one vm at a time to save network bandwith. After migration it upgrades Vmware tools to match current host version.

Takes a CSV file as input with VMs to migrate.

Param (
	[Parameter (Mandatory = $True)]
	$file
)
$vms = Import-Csv $file

foreach ($vm in $vms)
{
	Write-Host "Migrating VM" $vm.name
	Move-VM -VM $vm.name -Destination Cluster01
	Write-Host "Updating Vm-tools on " $vm.name
	Update-Tools -VM $vm.name -NoReboot
}

Fix VMware tools not running on Windows servers

Jonas Dahlgren powercli, powershell

I had some trouble with VMwaretools stopping on some machines and decided to automate restart och vmware tools. I wrote this script which takes a view parameter to view current status. If you start the script whitout the view parameter it will try to restart vmware tools.

fix-toolsnorunning.ps1

param
(
[parameter(Mandatory = $false)]
[switch]
$view
)

#Connect to Vcenter
$cred = Get-Credential
Connect-VIServer vcenter -Credential $cred | Out-Null

Write-Host -ForegroundColor Green "Collecting VMs"
$toolsvm=get-vm | where { $_.GuestId -like "*Windows*" -and $_.Extensiondata.Summary.Guest.ToolsStatus -like "toolsnotrunning" -and $_.Powerstate -eq "PoweredOn"}

#Stop script if no VMs reports tools not running
if ($toolsvm -eq $null)
{
Write-Host "Nothing to fix"
Disconnect-VIServer vcenter -Confirm:$false
exit
}

if ($view)
{
Write-Host "VMs whitout tools running"
foreach ($vm in $toolsvm)
{
Write-Host $vm
}
}
Else
{

foreach ($vm in $toolsvm)
{

if ($vm -match "^(?<Name>\S*)\s.*$") { $vm_name = $Matches.Name }
else { $vm_name = $vm }

$vm_hostname = $vm_name.name +".domain.local"

if (Test-Connection -Computername $vm_hostname -BufferSize 16 -Count 1 -Quiet)
{
Invoke-Command -Computername $vm_hostname -ScriptBlock { stop-Service -name vmvss; start-service vmvss } -Credential $cred
Write-Host "Service restarted on $vm_name"
}
Else
{
Write-Host -ForegroundColor Red "Unable to contact $vm_name"
}

}
}
#Disconnect from Vcenter.
Disconnect-VIServer vcenter -Confirm:$false

Create a new host via OP5 API with powershell

Jonas Dahlgren OP5, powershell

If you need to create a new host with OP5 api you can use something like this.
Template, hostgroups and contactgroups are not mandatory and can be removed from hash table.

 

function new-op5host
(
	[parameter(Mandatory = $true)]
	[string]$hostname,
	[parameter(Mandatory = $true)]
	[string]$alias
)
{
	$username = 'api_user$Default'
	$password = "password"
	
	$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $username, $password)))
	
	$hash = @{
		file_id = "etc/hosts.cfg";
		host_name = "$hostname";
		address = "$hostname.domain.com";
		alias = "$alias";
		max_check_attempts = "3";
		notification_interval = "5";
		notification_options = "d", "r";
		notification_period = "24x7";
		template = "Win_hosts";
		hostgroups = "Windows servers";
		contact_groups = "Windowsservrar"
	}
	$jsonData = $hash | convertto-json
	
	$result = Invoke-RestMethod -Method POST -ContentType "application/json" -Uri "https://op5.domain.com/api/config/host" -Body $jsonData -Headers @{ Authorization = ("Basic {0}" -f $base64AuthInfo) }
	
	#Save
	$result = Invoke-RestMethod -Method POST -ContentType "application/json" -Uri "https://op5.domain.com/api/config/change" -Headers @{ Authorization = ("Basic {0}" -f $base64AuthInfo) }
		
}

Change wallpaper on windows 7

Jonas Dahlgren powershell, Windows 7

I needed a script to change desktop wallpaper for all users using the default one with an outdated company logo on. I came up with this startup script as a solution. Set $filesize to the size of the old wallpaper to only change wallpapers with same filesize. Use as logon script.

$filesize = 100593
$bg = Get-Item ("$env:USERPROFILE\appdata\Roaming\Microsoft\Windows\Themes\TranscodedWallpaper.jpg)
if ($bg.length -eq $filesize)
{
Copy-item "\\fileserver\UsrLogon\wallpaper\img0.jpg" "$env:USERPROFILE\appdata\Roaming\Microsoft\Windows\Themes\img0.jpg" -Force
Set-ItemProperty -path 'HKCU:\Control Panel\Desktop\' -name wallpaper -value "$env:USERPROFILE\appdata\Roaming\Microsoft\Windows\Themes\img0.jpg"
rundll32.exe user32.dll, UpdatePerUserSystemParameters
}